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HD 89744

HD 89744
觀測資料
曆元 J2000.0
星座 大熊座[1][2]
星官
赤經 10h 22m 10.5s[1][2]
赤緯 +41° 13′ 46″[1][2]
視星等(V) 5.76[1][2]
特性
光谱分类F7V[1][2]
U−B 色指数0.08[1][2]
B−V 色指数0.54[1][2]
R−I 色指数[1][2]
天体测定
徑向速度 (Rv)0.08 km/s
自行 (μ) 赤经:-7 mas/yr
赤纬:- mas/yr
视差 (π)0.041 mas
距离130 ly
(40 pc)
绝对星等 (MV)2.83[3]
其他命名
BD+41 2076,SAO 43309,HD 89744,HR 4067,HIP 50786,GC 14225,GJ 9326, NLTT 24128
參考資料庫
SIMBAD资料

HD 89744,又名BD+41 2076SAO 43309HR 4067,是一颗大熊座的恒星[1][2],视星等为5.76,位于銀經178.39,銀緯56.39,其B1900.0坐标为赤經10h 16m 13.9s,赤緯+41° 56.39′ 14″。該恆星是距離地球約130光年的黃-白矮星。2000年4月以逕向速度法發現該恆星旁有一顆系外行星[4]

HD 89744的質量是太陽的1.45倍,投影自轉速度8.0 km s–1.[3]

行星系統

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HD 89744的行星系[5]
成員
(依恆星距離)
质量 半長軸
(AU)
轨道周期
()
離心率 傾角 半径
b >8.58 ± 0.71 MJ 0.934 ± 0.054 256.80 ± 0.13 0.6770 ± 0.0072

伴星

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2004年發現一顆質量為太陽0.076倍的伴星 HD 89744 B,主星和伴星投影距離2,456天文單位[6]

參見

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參考資料

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  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Pulsating variable Star. SIMBAD. Centre de Données astronomiques de Strasbourg. [2012-07-13]. (原始内容存档于2016-03-19). 
  2. ^ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 VizieR Detailed Page. [2012-07-13]. (原始内容存档于2016-03-04). 
  3. ^ 3.0 3.1 Pizzolato, N.; Maggio, A.; Sciortino, S., Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases, Astronomy and Astrophysics, September 2000, 361: 614–628, Bibcode:2000A&A...361..614P 
  4. ^ Korzennik; et al. A High-Eccentricity Low-Mass Companion to HD 89744. The Astrophysical Journal Letters. 2000, 533 (2): L147–L150. Bibcode:2000ApJ...533L.147K. arXiv:astro-ph/0003045可免费查阅. doi:10.1086/312611. 
  5. ^ Butler; et al. Catalog of Nearby Exoplanets. The Astrophysical Journal. 2006, 646 (1): 505–522 [2012-11-22]. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493可免费查阅. doi:10.1086/504701. (原始内容存档于2009-05-02). 
  6. ^ Mugrauer, M.; Neuhäuser; Seifahrt; Mazeh; Guenther. Four new wide binaries among exoplanet host stars. Astronomy and Astrophysics. 2005, 440 (3): 1051–1060 [2010-01-01]. Bibcode:2005A&A...440.1051M. arXiv:astro-ph/0507101可免费查阅. doi:10.1051/0004-6361:20042297. (原始内容存档于2014-02-25). 

外部連結

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HD 89744
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